Proceed to urge on about a man (2,5)
I believe the answer is:
go ahead
'proceed' is the definition.
(I've seen this in another clue)
'urge on about a man' is the wordplay.
'urge on' becomes 'goad' (I've seen this in another clue).
'about' means one lot of letters goes inside another.
'man' becomes 'he' (pronoun for a man).
'a'+'he'='ahe'
'goad' placed around 'ahe' is 'GO-AHEAD'.
'to' is the link.
(Other definitions for go ahead that I've seen before include "Signal to proceed" , "Lead" , "Up-and-coming -- authorisation" , "Enterprisingly progressive" , "Permission to proceed" .)